Sports cat & oem cat back

[Gavin_s3]

Treating my s3 to a sports cat and downpipe on Thursday. Getting a custom one made up and fitted to my oem cat back.
Has anyone got any videos of this similar set up? Struggling to find any.

Thanks, Gav.

 

[prt57]

Whilst I do not have any videos. this is like my exhaust. I am running the APR down pipe and sports cat with the oem cat back. The noise is very similar to stock, maybe a bit deeper but the APR pipe does have a resonator.
You may get a light on the dashboard that would have to be mapped out.

 

[Gavin_s3]

Have you noticed any performance gains?
I'm aware of the light, did this show up on yours?
I'm getting a 3" sports cat & downpipe with a reducer to my oem system, hoping it sounds a lot sportier well it should with only the one resonator in the cat back.

 

[prt57]

The benefit of what you are doing is that the cat restriction is reduced. As I was having software added at the same time, I never drove it with just the downpipe fitted. A downpipe and an intake will get you to stage 2.

 

[Gavin_s3]

Correct. What power did you get with your mods?

 

[prt57]

I am at approx 370 BHP at stage 2+

 

[Rayner_1704]

Avoid sports cat I fully melted mine after a day at the drag strip